D-ring



FIG. 1 is a front, top and right side perspective view of a D-ring, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a top, right side and front view thereof, showing a strap attached thereto.

The strap shown in broken lines in FIG. 8 depicts environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a D-ring, as shown and described. 